7.-Look!A book is on the floor.Whose is it?
-It ______be Rick's.It has his name on it.( 。
A.mustn'tB.can'tC.mustD.need

分析 --看,地板上有本書(shū).是誰(shuí)的?
--一定是瑞克的.上面有他的名字.

解答 答案:C  情態(tài)動(dòng)詞表推測(cè)的用法.must 表示很有把握的推測(cè),其意為"一定""肯定",只用于肯定句,一般不用于否定句或疑問(wèn)句;can't表示很有把握的否定推測(cè),意為"不可能";need需要.根據(jù)It has his name on it.上面有他的名字.推測(cè)可知一定是瑞克的.表示很有把握的推測(cè),故選C.

點(diǎn)評(píng) 主要考查情態(tài)動(dòng)詞表推測(cè)的用法.一定注意情態(tài)動(dòng)詞的含義和用法,然后根據(jù)句意,來(lái)推測(cè)所需的情態(tài)動(dòng)詞.本題主要考查must的用法.

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